Features

service track programming (The S-Nano does not support a service track.)

stationary DCC decoders

Limitations

Only the default speed step is supported for rolling road: 128¹

¹) The mode word is currently not changed if the speed step of a loco is not set to 128.

How it works

Rocrail sends every 25ms a byte string like "O 73 3F CC 80" as a command to SPROG II which on its turn generates the real DCC packet on the track output.
This byte string is a hexadecimal representation of the DCC packet to be send. A complete refresh cycle will take about 4 seconds if all 128 slots are in use.